Echinoderms are exclusively marine animals based on a pentaradiate body plan. Included in this phylum are the familiar sea stars ("starfish"), brittle stars, sand dollars, sea urchins, crinoids and sea cucumbers.
types of echinoderms
sea cucumber
Vertebrate or Invertebrate?
Echinoderms are invertebrates. While some have spines, a spine is not necasirly a back bone so it does not count as a backbone. Body Symmetry
Echinoderms have only radial symmetry. Method of Feeding and Digestion
Echinoderms have a filter feeding system, which means they absorb suspended particles passing by. The Echinoderms digestion is tube within a tube. Echinoderms do have a mouth, stomach, and anus. Coelom
Echinoderms have coeloms with the water-vascular-system. This means that they have fluid filled cavities, which allows it to move. Hook
The Echinoderm needs a derm-atologist.
Other Information
- Echinoderm is Greek for scaly skin.
- Echinoderms reproduce sexually and asexually.
- The Water-Vascular-System is unique to Echinoderms.
- Echinoderms are unique because they are the only large animals that can survive of desert conditions.
Multiple choice question
What classifys an Echinoderm?
A-bilateral symmetry, scaly skin, invertebrate
B-radial symmetry, scaly skin, invertebrate
C-radial symmetry, no mouth, vertebrate
D-bilateral symmetry, no stomach, vertebrate
Echinoderms are exclusively marine animals based on a pentaradiate body plan. Included in this phylum are the familiar sea stars ("starfish"), brittle stars, sand dollars, sea urchins, crinoids and sea cucumbers.
Vertebrate or Invertebrate?
Echinoderms are invertebrates. While some have spines, a spine is not necasirly a back bone so it does not count as a backbone.
Body Symmetry
Echinoderms have only radial symmetry.
Method of Feeding and Digestion
Echinoderms have a filter feeding system, which means they absorb suspended particles passing by. The Echinoderms digestion is tube within a tube. Echinoderms do have a mouth, stomach, and anus.
Coelom
Echinoderms have coeloms with the water-vascular-system. This means that they have fluid filled cavities, which allows it to move.
Hook
The Echinoderm needs a derm-atologist.
Other Information
- Echinoderm is Greek for scaly skin.
- Echinoderms reproduce sexually and asexually.
- The Water-Vascular-System is unique to Echinoderms.
- Echinoderms are unique because they are the only large animals that can survive of desert conditions.
Multiple choice question
What classifys an Echinoderm?
A-bilateral symmetry, scaly skin, invertebrate
B-radial symmetry, scaly skin, invertebrate
C-radial symmetry, no mouth, vertebrate
D-bilateral symmetry, no stomach, vertebrate